Support for ignoring _directories

Resolves #128

Author: bmuenzenmeyer

CHANGELOG

@@ -1,4 +1,8 @@
 THIS CHANGELOG IS AN ATTEMPT TO DOCUMENT CHANGES TO THIS PROJECT.
+
+PL-node-v0.11.0
+ - ADD: Ignore pattern directories that start with an underscore.
+
 PL-node-v0.10.1
  - ADD: Added more unit tests for recently more-modular code
  - FIX: Lineage was not working for patterns with pattern parameters

README.md

@@ -177,6 +177,12 @@ If your instance of Pattern Lab lives in a subdirectory of your server, for inst
 
 Default: blank
 
+##### excluding patterns
+
+If you'd like to exclude an individual pattern you can do so by prepending the filename with an underscore, like: `_filename.mustache`
+
+You can also exclude complete directories by prepending the directory name with an underscore, like: `/_experiment/...`
+
 ##### Verbose Mode
 `patternlab.json` is a file created for debugging purposes. Set `debug` to true in `.config.json` to see all the secrets.
 

builder/patternlab.js

@@ -65,17 +65,27 @@ var patternlab_engine = function () {
 
     var pattern_assembler = new pa(),
     entity_encoder = new he(),
-    pattern_exporter = new pe();
-
-    diveSync('./source/_patterns', function(err, file){
-      //log any errors
-      if(err){
-        console.log(err);
-        return;
-      }
-
-      pattern_assembler.process_pattern_file(file, patternlab);
+    pattern_exporter = new pe(),
+    patterns_dir = './source/_patterns';
+
+    diveSync(patterns_dir, {
+      filter: function(path, dir) {
+        if(dir){
+          var remainingPath = path.replace(patterns_dir, '');
+          var isValidPath = remainingPath.indexOf('/_') === -1;
+          return isValidPath;
+        }
+          return true;
+        }
+      },
+      function(err, file){
+        //log any errors
+        if(err){
+          console.log(err);
+          return;
+        }
 
+        pattern_assembler.process_pattern_file(file, patternlab);
     });
     //render all patterns last, so lineageR works
     patternlab.patterns.forEach(function(pattern, index, patterns){